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For static electrical beam steering, also known as electrical tilting, a complex weight is applied to each antenna element in the vertical direction.
Fig. 4 The amplitude and phase signals received by each antenna element in the a static and b moving scenarios, respectively.
For an antenna element in the q-th row, it is given as w_{q} = frac{1}{sqrt{Q}} exp left -j frac{2pi}{left -j (q-1)d_{V} costheta_{text{etilt}} right), (4) frac{2pi}{lambdaand polarization modes of a planar antenna array.
Then, the response of the antenna element in the ℓ-th row and the k-th column with respect to a plane wave from direction Ψ=T is [43]: begin{array}{*{20}l} left[mathbf{a}_{t}^{textrm{UPA}} phi,theta)right]_{(ell-1) N_{h} + k} = frac{1}{sqrt{N_{t}}} text{exp}left(j 2 pi (d_{v} (ell-1) cos{theta})right.
The received signal component at the n th antenna element in the k th time instant is expressed as y n k = ∑ i = 1 M h in s i k + ξ n k, k = 1, …, K, (1).
Similar(55)
In colocated MIMO radar, the transmitting antenna elements in the transmitter and the receiving antenna elements in the receiver are closely spaced.
One of the antenna elements in the array acts as the reference antenna.
The antenna elements in the horizontal and vertical directions are indexed by p and q, respectively.
(i) The radiation patterns of the antenna elements in MIMO case are examined.
where d is the distance between adjacent antenna elements in a uniform linear array (ULA) and λ is the carrier wavelength.
The antenna elements in each subarray are driven by the same RF chain but connected to a single phase shifter.
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